AMD XC3S1500-4FG320I

Overview

XC3S1500-4FG320I from AMD (formerly Xilinx) is a Spartan-3 FPGA featuring 1,474,560 system gates, 116 I/O pins, and a -4 speed grade operating at up to 333 MHz logic performance. It integrates 128 embedded 18×18 multipliers, 128 Kbits of block RAM, and supports SelectIO standards including LVCMOS, LVTTL, PCI, and HSTL. It is used in industrial motion control systems requiring deterministic real-time I/O processing.

For engineers reviewing the XC3S1500-4FG320I datasheet, pinout, applications, or equivalent options, key selection considerations include I/O voltage flexibility (1.2 V to 3.3 V), distributed RAM depth (16 bits), global clock network count (8), and configuration interface options (Master Serial, Slave Serial, Boundary Scan).

Technical Context

The XC3S1500-4FG320I implements a hierarchical FPGA architecture with configurable logic blocks (CLBs), interconnect resources, and dedicated digital clock managers (DCMs). Each CLB contains four 3-input LUTs and eight flip-flops, supporting synchronous logic and registered outputs.

It supports configuration via PROM, JTAG, or microprocessor interface, with full IEEE 1149.1 boundary-scan compliance. The device uses 90 nm CMOS process technology and operates over industrial temperature range (–40°C to +100°C).

Key Specifications

Pinout & Package

XC3S1500-4FG320I is housed in a 320-pin Fine-Pitch Ball Grid Array (FBGA) package with 25 mm × 25 mm body size, 1.0 mm ball pitch, and Pb-free (RoHS-compliant) finish. Pin assignments follow Xilinx Spartan-3 FG320 mechanical and electrical specification.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FPGA-based logic implementation applications.

Compared with XC3S1000-4FG320I and XC3S2000-4FG320I, the XC3S1500-4FG320I offers balanced gate count, I/O count, and power efficiency for mid-complexity industrial control and instrumentation-avoiding underutilization or resource exhaustion in fixed-FG320 layouts.

Availability

XC3S1500-4FG320I is available at Aetrix Electronics and suitable for industrial motion control, automated test equipment, and medical imaging interface applications requiring stable component supply and long-term lifecycle support.

Supply support for XC3S1500-4FG320I includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

AMD acquired Xilinx in 2022 and continues development and support of the Spartan, Virtex, and Artix FPGA families. Xilinx pioneered SRAM-based FPGA architecture and programmable logic solutions.

The Spartan-3 family was designed for cost-sensitive, high-volume applications requiring reliable I/O flexibility, moderate logic density, and industrial temperature operation-targeting embedded control, interface bridging, and real-time signal conditioning.

FAQ

What is the maximum operating frequency of the XC3S1500-4FG320I?

The XC3S1500-4FG320I has a -4 speed grade, guaranteeing timing closure for internal logic paths up to 333 MHz. Actual achievable system clock frequency depends on design complexity, routing, and I/O standard selection. The integrated Digital Clock Managers (DCMs) support output frequencies up to 320 MHz with jitter specifications defined in the Xilinx DS099 datasheet.

Does the XC3S1500-4FG320I support JTAG boundary-scan?

Yes, the XC3S1500-4FG320I fully complies with IEEE 1149.1 (JTAG) boundary-scan standards. It provides TCK, TMS, TDI, TDO, and TRST pins for in-system programming, debugging, and board-level test. This capability is documented in the Xilinx Spartan-3 FPGA Family Datasheet (DS099) and supported by iMPACT and Vivado tools.

What configuration modes does the XC3S1500-4FG320I support?

The XC3S1500-4FG320I supports Master Serial, Slave Serial, Slave Parallel, and JTAG configuration modes. It can be configured from external SPI PROM, microprocessor, or PC via JTAG. Mode selection is controlled by mode pins M[2:0], and all modes are electrically and functionally verified per DS099 Section 4.

Is the XC3S1500-4FG320I RoHS compliant?

Yes, the XC3S1500-4FG320I is manufactured with Pb-free (RoHS-compliant) packaging. The FG320 package uses matte tin finish on solder balls and meets JEDEC J-STD-020 moisture sensitivity level 3. Full compliance documentation is available in Xilinx's Product Change Notification (PCN) #0406151.

What is the difference between VCCINT and VCCAUX in the XC3S1500-4FG320I?

VCCINT supplies 1.2 V to the FPGA core logic (CLBs, interconnect, DCMs), while VCCAUX supplies 2.5 V to I/O banks, configuration circuitry, and JTAG interface. These are independent power domains; decoupling each with appropriate capacitors is required per Xilinx UG331 guidelines to ensure signal integrity and timing stability in the XC3S1500-4FG320I.